MC68HC908KX2 MOTOROLA [Motorola, Inc], MC68HC908KX2 Datasheet - Page 185

• Manufacturer Part Number: MC68HC908KX2
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

MC68HC908KX8 • MC68HC908KX2 • MC68HC08KX8 — Rev. 1.0
MOTOROLA
SCR1
SCR2
SCR0
SCP1
SCP0
4
SCALER
PRE-
Figure 14-4. SCI Transmitter Break Characters
At the start of a transmission, transmitter control logic automatically
loads the transmit shift register with a preamble of logic 1s. After the
preamble shifts out, control logic transfers the SCDR data into the
transmit shift register. A logic 0 start bit automatically goes into the least
significant bit position of the transmit shift register. A logic 1 stop bit goes
into the most significant bit position.
DIVIDER
3. Clear the SCI transmitter empty bit by first reading SCI status
4. Repeat step 3 for each subsequent transmission.
BAUD
PEN
PTY
Serial Communications Interface Module (SCI)
register 1 (SCS1) and then writing to the SCDR.
TXINV
GENERATION
16
PARITY
SCTE
SCTIE
TC
TCIE
T8
M
H
8
SCTIE
7
SCTE
TCIE
TC
SCI DATA REGISTER
6
SHIFT REGISTER
INTERNAL BUS
TRANSMIT
5
Serial Communications Interface Module (SCI)
11-BIT
CONTROL LOGIC
4
TRANSMITTER
3
2
1
LOOPS
ENSCI
SBK
TE
0
L
Functional Description
Technical Data
TxD
185